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The only bad part for me is that my full 100% upvote is less than the dust threshold so on comments, I am basically only earning Hive engine tokens.

In this respect it's better not to waste your voting power on comments because you and the person who gets the vote, won't earn anything from it. It's a good idea to work with tipping tokens on comments to reward interaction for example.

That is a great suggestion.

!CTP